Room temperature pH-dependent ammonia gas sensors using graphene quantum dots
Room temperature pH-dependent ammonia gas sensors using graphene quantum dots
复制标题
使用石墨烯量子点的室温 pH 依赖性氨气传感器
DOI：
10.1016/j.snb.2015.09.002
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发表时间：
2016-01-01
影响因子：
8.4
通讯作者：
Guo, Tailiang
中科院分区：
文献类型：
--
作者：
Chen, Wei;Li, Fushan;Guo, Tailiang
报道了一种基于石墨烯量子点(GQD)实现氨(NH3)气体传感器的简单溶液工艺路线。透射电子显微镜分析证实，多壁碳纳米管在超声作用下形成了8-10 nm的GQD。所制备的气敏元件在常温下暴露于NH3气氛中，表现出良好的选择性响应。结果表明，在酸性和中性条件下，通过调节GQD水溶液的pH值，可以得到两种电流响应相反的气敏元件，这可能是由于量子限制效应、边缘效应和GQD表面官能团的存在所致。(C)2015爱思唯尔B.V.保留所有权利。
We report a simple solution-process route to realize ammonia (NH3) gas sensor based on graphene quantum dots (GQDs). Transmission electron microscopy analysis confirmed that the 8-10nm GQDs were formed from multi-walled carbon nanotubes by using ultrasonication treatment. The as-fabricated gas sensor showed promising selectivity response when expose to NH3 ambient at room temperature. It is indicated that by adjusting the pH value of the aqueous GQDs in acidic and neutral, two types of gas sensors with contrary current responses could be obtained, which might be resulted from quantum confinement, edge effects and presence of functional groups on GQDs. (C) 2015 Elsevier B.V. All rights reserved.